The relation between the action potential and the active state in human fetal myocardium and its dependence on muscle length and contraction frequency.
D000200:Action Potentials; D004582:Electronics, Medical; D005333:Fetus / Q000502:physiology*; D006321:Heart / Q000502:physiology*; D006329:Heart Conduction System / Q000502:physiology; D006801:Humans; D009119:Muscle Contraction; D010210:Papillary Muscles / Q000502:physiology; D014159:Transducers